Have 2 Packs, same type. Even one would be enough for cabin by itself.

Warm air from bleed air -> Heat Exchangers -> Air Cycle Machine

Air Condt - Pack Operations

The ram air doors are fully open while on ground and during slow flight with flaps extended. (For heat exchange)

It has own light illumination on air condt panel

Pack Temp Control Valve

To control the bleed air that goes into pack, you use the pack switches on air condt panel

Air Conditioning

The air from left pack first goes to the Flight Deck and rest goes to mix manifold.

The air from right pack goes to mix manifold.

From the mix manifold air goes to FWD and AFT Pax cabin

Temperature Control - Air Condt

Temperature control of 3 zones : Flight deck, FWD and AFT

Pax cabin

Trim air sys uses warm bleed air from upstream of the pack to warm up pack air for related zones

EQP Cooling System

Supply fan collects the cool air from Pax cabin and supllies it to cocpit displays and E&E bayExhaust fan collects the warm air from cocpit displays, CBs and E&E bay. On the GND its open and discards warm air. During flight it sends the warm air to cargo bay

Air Condt Non-Normal Operations

If downstream air temp from packs is too high we see the illumination : ZONE TEMP on the related Temp Controller/ We choose a colder selection and chechk the temperature change